Heating panel mode of rectangular tubes

摘要

The heating panel is constructed from tubes (1) of rectangular cross-section with sealed ends mounted side-by-side. The rectangle forming the cross-section is relatively narrow and the tubes are arranged with the narrow sides abutting against each other. Adjacent tubes communicate with each other through elongated holes (4) in facing wall. The holes are surrounded by a ring of material (5) which facilitates the pressure welding together of the adjacent pipes.